Setts



J. WINN & A. FEINBERG.

SAFETY LOCK.

-APPLICATION FLED SEPT.3. 1914- 1,193,653. V V Patented Aug. 8, 1916.

/C D B I i E I J i i TTE %TAE PATEN FFGEO JOHN WINN, OF BROOKLINE, ANDAARON FEINBERG, OF DORCHESTEE, MASSACHU- SETTS. i

V SAFETY-LOCK.

Specication of Letters Patent.

Patented Aug., &1916.

Application filed September 3, 1914. Serial No. 859942.

To all 'whom it may concem u Be it known that we, JOHN WINN, a citi zenof the United States, and a 'resident of Brookline, county of Norfolk,Commonwealth of Massachusetts, and AARON FEIN- BERG, a citizen of theUnited States, and a resident of Dorchester, County of Sufi'olk,Commonwealth of Massachusetts, have invented certain new and usefulImprovements in Safety-Looks, of which the folloWing is a specificationaccompanied by drawings.

This invention relates to safety locks, but more particularly to asafety guard or shutter adapted to be applied to the lock strike anddesigned to prevent the insertion of a flexible piece or tool betweenthe door and door jamb for the purpose of forcng the bolt backwardly.

In a spring latch lock, of ordinary construction, there is usually moreor less space or clearance between the door and door jamb, and aflexible tool may be inserted without much difliculty into this spacefrom the outside, and manipulated to force back the bolt to open thedoor. The tool may be inserted between the edge of the door and the jambor else a hole may be cut through the corner of the door to make a moredirect entrance for the tool.

Our guard or Shutter is so constructed that it will effectually preventthe forcing of the lock by any of these methods, and our device isoperated automatically by the closing and opening of the door.

Further objects of the invention will hereinafter appear and theinvention is shown in the accompanying drawings, in which- F igure 1 isa horizontal sectional View of devices embodying the invention; Fig. 2is a similar view partly broken away of the guard or shutter in normalposition. Fig. 3 is a front view of Fig. 2; and Figs. 4 and 5 arehorizontal sectional views, partly broken away of modifications.

Referring to the drawings, A represents a portion of a door, having thelock casing B therein, C is the door jamb, and D is the strike. The boltE has the usual beveled head F and slides in the lock casing.

In Fi 's. 1, 2 and 3 We have shown one form of guard movably mounted atthe opening of the strike D. The beveled end F of the bolt forces oneportion of the guard inwardly, as

the guard is swung outwardly as shown in Fg. 1, into the space betweenthe door and door j amb.

The guard may be constructed in various ways, and one form ofConstruction shown in Fgs. 1, 2 and 3 comprises two members G and H,pivoted on a common pivot J in any suitable manner, as by means of thelugs K and L on the respective members.

In order to cause the guard to return to normal position when the boltis withdrawn, T provide a retracting spring O of any suitableconstruction, shown as a coiled spring coiled about the pivot J andhaving one end a bearing on the member G and the other and longer end babutting against the edge of the opening in the strike.

Another spring P is coiled about the pivot J and has one end c bearingon the member G and the other end d hearing against the member H, sothat as the member G is pressed inwardly by the bolt, the member H isforced outwardly through the intermediary of the spring P, and thisspring connecton ermits relative movement between the mem ers G and H.The member G may be rocked about its pivot to a greater angular extentthan the member H', as indicated in Fig. 1, and the member H will alwaysbe tightly pressed against the door. If desired,

a recess Q may be formed in the door or in a portion of the lock casingas shown, for the reception of the end of the member H, and thus furtherand absolutely prevent the insertion of a tool by force to press backthebolt.

forded by the spring member S, and an additional retracting spring 0only is provided, having one end a hearing against the spring member Sand the other end b having an abutment against the edge of the strike asshown.

In Fi 5 a fiexible guard or Shutter is provide in one piece, comprisinga spring U Secured to the lugs V and pivoted on the pivot J. Theretracting spring O is also provided for this spring guard.

ally block the insertion of a tool in this way,- as well as directlythrough the space 'between the door and the door amb.

Our device is so constructed that it may be applied to almost anyexisting lock of the type specified herein, and the provision offlexibility in the device enables it to be used with bolts of difl'erentsizes, or which travel longitudinally different distances.

We claim anddesire to obtain by Letters Patent the following:

1. In a spring-latch lock, the combination with the lock casing, bolthaving a beveled end, and strike, of a guard pivoted at the opening ofthe strike, one portion of the said guard being adapted tobe pushedinwardly by the bolt, so that the remaining portion of the guard isswung outwardly to form an obstruction in the space between the door anddoor jamb and a retracting spring for returning` the guard to normalposition when the bolt is withdrawn, the said portion "of the guardwhich is adapted to be pushed inwardly by the bolt being eapable ofgreater angular movement about the pivot than the remaining portion ofthe guard.

2. In a spring-latch lock, the combination with the lock casing, bolthaving a beveled end, and strike, a two piece guard, a common pivotlocated at the opening. of the strike, the members of saidguard beingpivoted on said pivot, independent .springs for each of the members ofsaid guard, so that one member of the guard may rock about the pivot toa greater extent than the other,

the bolt being adapted to push one member of the guard inwardly andthereby carry one member of the guard inwardly and' thereby carry theother member outwardly into the space between the door and door janb,the lock casing having a recess to receive the end of the other memberof the guard which is swung outwardly into the said space between thedoor and door jamb.

In testimony whereof we have signed this specification in the presenceof two subscribing witnesses.

JOHN WINN. r AARON FEINBERG. Witnesses:

E. J. PALMER, ERNEST W. THOMPSON.

